Floor drain



E. W. N. BOOSEY FLOOR DRAIN Filed June 22, 1934 Feb. 16, 1937.

m m w m ATTORNEY.

Patented Feb. 16, 1937 UNITED STATES PATENT OFFICE FLOOR DRAIN Edward W. N. Boosey, Detroit,. Mich.

Application June 22, 1934, Serial No. 731,919

7 Claims. (01. 210-56) This invention relates to floor drains, the prinhorizontal to cause material to flow readily to the cipal object being to provide. afloor drain of drain. Just below the hub- 8 is provided a ledge suchcharacter of construction that the normal or shoulder II on which is loosely positioned a liquid level within the drain body is above the disdrain plate I2 having a central aperture here charge outlet. The floor drain is adapted for shown as a threaded aperture to receive a sep-' 5 use, for instance in garages or the like, where arate tubular discharge sleeve or conduit I3. The oilwill-be discharged into the drain, and the obdrain plate has apertures It on opposite sides of ject is to provide a. floor drain of a character to the threaded aperture for the tube I3 and" a cause separation of the oil and water flowing U-shaped handle member I5 is provided with its thereintoand permit the water todischarge to opposite parallel leg portionsextending through 10 the sewer while the oil may be removed by hand the apertures i4. and provided with a nut on the or'by means of a discharge outlet for oil at a lower end.

level above the outlet for the. water, The handle is preferably loosely positioned and It is alsoa feature and object of this invention when the grating I0 is removed this handle is in toprovide a construction permitting accessibility, position to be grasped by the operator and this 15 to all parts of the drain through the grated inlet, drain plate lifted from position to provide access areceptacle being removably supported withinthe to the interior of the drain body. The upper drain body in which heavier, waste materials may. section of the drain body has a transverse wall accumulate and thus providing a separation not I6 and a sloping wall I! extends from the upper go only of the oil and water butv also to separate endof the wall I6 to the flange or ledge II. These therefrom the heavier greases. and like waste walls I6 and I1- form a separate chamber in the material. By this arrangement the liquid oils are upper section of the drain body and this chamber to a material degree cleaned of solid and semiis again divided by a wall I8 terminatin below solid matter and such reclaimed oil may again be the sloping wall I? thereby providing a chamber utilized invarious ways and material flowing to IS on one side of the wall I8 and 20 on the other 25 the sewer is practically free from oilvthus. conas will be understood from Fig. 2. This chamber forming to therequirement in our cities that no has a bottom wall 2! and thus is closed to the oil shall be discharged into sewers. interior of the drain with the exception that the It is also an object of. the invention to'provide bottom wall 2| under the chamber I9 has a.

a construction that is comparatively simple and threaded aperture to receive a tube 22 which ex- 30 inexpensive in construction and of such character tends very nearly to the bottomv of the lower seethatwhen once installed can be readily maintion 2. The tube is open-ended as shown. The tained inits operative condition all as isherein- 'side wall of the upper section I has a threaded after more fully described. aperture to receive a hub 23 which in turn re.-

These objects and the various novel features of ceives the end of the sewer pipe (not shown). 35 the invention are hereinafter more fully described The wall I8 between the chambers I9 and 20.. has and claimed, and the preferred form of cona vertical slot 24, the bottom of which is above struction of a floor drain embodying my inventhe lower edge of the outlet in which the hub. 23 tion is shown in the accompanying drawing in is inserted, the purpose of which slot is hereinwhichafter described. The upper section I also has a 40 Fig. 1.is a vertical section of my improved floor number of lugs 25 on the, wall I6 and onthe outer drain taken on line I-I of. Fig. 2. wall of a section. I as will be understood from Fig; 2 is a cross section. thereof taken on. line Fig. 2, and a catch basin 26 is provided with a rim 2-2 of Fig. 1. 21 which lies on the said lugs. The flange 21 is The drain consists of a body preferably formed spaced from the wall I6 and the section I pro- 45 of two sections I and 2, the-lower section having viding an opening 28 thereabout through which a hub 3 to receive the open lower end 4, of the liquid overflowing from the receptacle 26 may section I. Bolts 5 may be provided to secure the pass into the main body I and 2 of the drain. two sections together and-a caulking 6 isprovided In some cases of installation, it is desirable to in the space between the hub 3.. and. the lower' have an oil outlet and this is here shown as a 50 end of the section I as will be understood from pipe 29 threaded in a hub'30 provided in the Fig. 1-. The section Zhas a closed. bottom I and section I, the bottom of which is located above the. upper section I has a hub portion 8 at its the water level and preferably above the bottom inlet end practically flush with the floor. line of the slot 24 on the opposite side of the drain which, as shown at. 9, is at. a slight angle to the body. 55

The oil outlet 29 may be dispensed with in some installations where it is not practicable to provide a receiving basin to which it discharges and in such case the oil must of necessity be removed from the drain by hand and this is readily accomplished due to the fact that the drain plate as well as the receptacle 26 are loosely mounted and readily removable through the upper end of the section I.

This invention seeks to provide a construction in which the water may flow out of the drain head due to the outlet being at a lower level than the oil outlet and thus retain a body of oil on the surface of the Water above the level of the Water outlet and the construction shown accomplishes this purpose as will be understood from the following description of the operation of the device.

Preparatory to use of the device, the drain is filled with water to the Water level indicated by dotted lines a. Thereafter as water, oil, grease and dirt from the floor of a garage, for instance, flows into the drain it passes from the drain i plate through the. tube l3 into the receptacle to I 26 where the heavier material tends to remain and the lighter materials flow upward out of the receptacle and downward through the space 28 into the body of water.

The oil will float on the surface of the Water and, as the water level through introduction of the above mentioned material is raised, water flows out of the outlet and into the sewer line connected with the hub 23. The oil floating on the top of the water can pass out through the outlet 29 and thus be separated both from the heavier greases and material caught in the receptacle 26 and Water and discharged to a storage tank and may eventually be reclaimed or purified by separation of the oil into its lighter and heavier constituents. The water, it will be noted, passes upwardly through the tube 22 into the chamber Ill and if there is a slow accumulation of Water it will pass the slot 24 into the chamber 20 and thence out through the hub 23 and sewer line connected therewith. If there is a rapid accumulation of water, as is oftentimes the case, the water level will raise to the top of the dividing wall 18 and flow over this wall into the chamber 20 and thence to the outlet. Thus, in what may be termed normal use, where small quantities of water and oil are discharged into the drain, the water level is at the dotted line a but when a larger quantity is discharged into the receptacle the water is at the same level as the upper edge of the wall l8 and the Water level in either case is below the outlet 29 for the oil.

The main chamber, as previously stated, is closed at the top by the plate it. The chamber is vented at the top just beneath this plate for which purpose the side wall thereof is provided with a hub 50 for connection with a vent stack. The vent opening, it will be noted, is above the maximum level of the water within the body of the drain.

Thus, in the construction shown, there is no possibility of water flowing through the oil outlet 29 as the arrangement of the parts provides a well for the oil and water in which the oil has opportunity to rise to the surface of the water and this is due to the provision of the wall 16 having the two chambers therein and the tube 22 extending to the bottom of the drain body and through which only the water will pass. This general arrangement of parts constitutes one of the principal features of my invention, namely,

the construction of a floor drain in which the oil outlet is above the main outlet of the drain body and in which the water level also is above the main outlet from the drain and by this arrangement I am able to provide for an automatic separation of the oil and water, dirt and grease, the latter of which accumulates in the receptacle 26 thereby preventing such grease and dirt from passing into the sewer to accumulate therein and discharging the oil comparatively free of dirt and grease and such heavier materials as will separate naturally by gravity in the receptacle 26.

It is also pointed out that the outlet 29 may be dispensed with for the reason that the 6il floating on' the surface of the water will accumulate in the main portion of the body section l until it stands at a level slightly above the grate H! which should be notice to the attendant that the drain should be emptied of oil. Oil will accumulate as stated'with the main outlet of the drain in the neighborhood of ten inches below the grate ill. Under this condition oil will be readily observable at the grate particularly when considerable water and material are flushed into the device in which case the water level will be raised to the top of the wall it and will graduallynormally fall to the level indicated by the dotted line a due to seepage of the water through the slot 24.

It is believed from the foregoing description that the principal object and feature of the invention, namely, the separation of oil from water and the heavier waste materials such as grease and dirt and the like is accomplished and that no oil will flow into the sewer through the outlet from the drain and that the device may be readily cleaned by removal of the grate, the drain plate I 2, and receptacle 26 which provides access to the main body of the drain and as the wall I! has an opening closed by the plug 4'} of which one is provided for the chamber l9 and one for the chamberv 20, access is had to these chambers for cleaning purposes.

By the arrangement of the parts described, the minimum water level within the drain body is maintained above the lowermost point of the outlet to which the hub 23 is connected and a maximum water level is prevented from being materially above the uppermost point of the said outlet. This is secured by the provision of the wall l8 having the slot 2 therein, the lower edge of which slot is above the lowermost point of the outlet and the upper edge of the wall over which the water must flow from the section IQ of the N outlet chamber to the section 20 thereof is preferably slightly above the uppermost point of the outlet. As the oil outlet 29 has its lowermost point preferably above the possible maximum water level no water may flow out of the said oil outlet and by the provision of the outlet chamber consisting of the two sections i9 and 2B and the tubular member 22 opening to adjacent the bottom of the drain body no oil can pass to the outlet chamber. Thus by the construction described including the receptacle 25, I am able to separately dispose of the oil, the water and the dirt, grease, etc., passing in mass into the drain body.

It is also to be observed that various alterations in form and arrangement of parts of the structure may be made and still secure applicants principal object of maintenance of an oil level above the outlet to the drain and other features without departing from the spirit and scope of the invention as defined by the appended claims.

Having thus briefly described my invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is-- 1. A floor drain for the .purpose described comprising a drain body having an inlet at its upper end, means within the drain body separating the same into a main chamber and an outlet chamber, a water outlet opening to the said outlet chamber, an oil outlet opening to the main chamber, the lowermost point of which is above the uppermost point of the water outlet, and means in the outlet chamber providing for a minimum water level above the lowermost point of the water outlet and a maximum water level at about the uppermost point of the outlet.

2. A floor drain comprising a drain body having an inlet at the upper end and an outlet on one side thereof below the upper end, said body being separated into a main chamber into which material from the inlet directly flows and an outlet chamber opening to the main chamber adjacent the bottom thereof, a wall in the said outlet chamber, the upper edge of which is above the uppermost point of the outlet, the parts being so arranged that water flowing upwardly to the outlet chamber is required toflow over the said wall to the said outlet, and an oil outlet on one side of the body, the lowermost point of which is above the upper edge of the said wall of the outlet chamber.

3. A floor drain for the purpose described comprising a drain body having an inlet at its upper end, a receptacle within the body into which material flowing into the drain passes and from which the material passes by overflowing the upper end of the receptacle and into the body, said receptacle providing a means for deposition of waste material such as-grease, dirt and the like, said drain body having an outlet for water on one side thereof and an oil outlet at a level above the said water outlet, means for maintaining the water level in the drain body at a point 1 above the lowermost point of the water outlet and below the lowermost point of the oil outlet whereby oil may be discharged from the interior of the chamber separately from the water.

4. A floor drain comprising a drain body having an inlet at its upper end, an outlet on one side therebelow, means within the body separating the same into a main chamber and an outlet chamber to which the aforesaid outlet opens, said outlet chamber opening to the main chamber adjacent the bottom thereof whereby liquid may pass upwardly from the bottom of the main chamber to the outlet chamber, a wall in the outlet chamber dividing the same into two parts to one of which the outlet opens and to the other of which fluid is discharged through the said opening to the main chamber, the upper end of said wall being above the uppermost point of the outlet whereby water on flowing upwardly to the chamber on the opposite side of the said wall will flow into the portion of the chamber open to the outlet when the water has attained the level of the upper end of the said wall, and an oil outlet open to the main body, the lowermost point of which is above the maximum level determined by the upper edge of the said wall.

5. A floor drain comprising a drain body having an inlet at its upper end, a water outlet on one side thereof below the upper end, an outlet chamber provided in the main body having an opening adjacent the bottom of the body through which fluid may flow to the outlet chamber, said outlet chamber being formed of two sections into one of which water flows from the drain body and the other of which is freely open to the outlet, the wall between the two sections of the outlet chamber having a slot, the lowermost point of which is above the lowermost point of the water outlet and the upper'edge of which wall is approximately at the uppermost point of the water outlet, an oil inlet opening to the drain body, the lowermost point of which is above the upper edge of the said Wall between the two sections of the outlet chamber, a drain plate at the inlet end of the body having a depending tubular portion through which all material must pass from the inlet, a receptacle removably supported in the body into which the said depending tubular portion extends and providing a structure in which material flowing thereinto must'pass into the main body above the lower end of the said depending tubular portion whereby waste material of greater specific gravity than oil and water tends to accumulate by gravity, the arrangement of the water outlet, outlet chamber, and oil outlet providing a means whereby oil only may be discharged through the outlet and water only through the water outlet.

6. A floor drain comprising a drain body separated into amain chamber and an outlet chamber, said body having an inlet at its upper end and an outlet therebelow in the side of the drain body, a dividing wall in said outlet chamber separating the same into sections to one of which the outlet is open and the other of which is open through its bottom to the lower end of the main chamber, said dividing wall having its upper edge at approximately the same level as the uppermost point of the outlet, said dividing wall further having a vertical slot providing a passageway for water between the two chambers, the lowermost point of which is above the lowermost point of the outlet, said outlet chamber and slotted wall providing means determining the minimum and maximum water levels within the body of the drain, the arrangement being such that on slow accumulation of water, oil etc., in the drain body the water is discharged to the said outlet chamber and passes through the slot to the outlet and upon a sumcient amount of water being discharged into the drain body the water rises and flows over the upper edges of the said wall to the outlet, said outlet chamber being closed to the main chamber except through the said opening in communication with the bottom thereof. g

7. A floor drain comprising a drain body having an inlet at its upper end to receive oil and water, an oil outlet on one side thereof, a water outlet, means associated with the water outlet for maintaining a minimum water level in the drain body above the lowermost point of the water outlet, and a maximum water level below the lowermost point of the oil outlet. 

